Bearing mounting



March 23, 1943. P KLAMP 2,314,622

BEARING MOUNTING Filed March 21, 1 942 3 Sheets-Sheet 2 @423 z5 y l afA March 23, 1943.. P KLAMP 2,314,622

/ BEARING MOUNTING Filed Maron 21, 194,2 s sheets-sheet s V llll @GMM Patented Mu. 23,- 1943 ammo. MovN'rmd Paul Klamp, Canton, Ohio, assignor to The .limken Roller Bearing CompanLYCanton, Ohio, a

corporation of Qhlo` Application March 21, 1942, Serial No. 435,627

19 Claims. (Cl. 30s- 207)Y This invention relates to bearing mountings, particularly preloaded rotary antifriction shaft bearing mountings. The principal object of the present invention is to devise a simple and economical bearing mounting of the above/ type which will provide for adjusting the bearing preload, which is automatically adjustable to compensate for exure and axialdisplaoement of the shaft and to take up wear in the bearing, and which will provide free axial movement of the bearing without requiring a free fit of the raceway supporting member in the mounting. The invention consists principally in providing a. sleeve with one end portion rigid with the mounting, with the other end portion free of said mounting and constituting a seat for one of the raceway members of the bearing, and with an axially resilient end intermediate portion adapted bols refer to like parts wherever they occur,

Fig. 1 is a central longitudinal sectionthrough a tail stock center provided with a preloaded bearing mounting embodying my invention,

Fig. 2 is a. transverse section on the line 2--2 in Fig. 1,

Fig. 3 is a fragmentary central longitudinal section through a turret lathe spindle provided of the accompanying drawings, my invention is shown embodied in a roller bearing tail stock center mounting comprising a housing or casing I having a bore 2 extending therethrough; a spindie 3 disposed in said bore and terminating beyoud the end thereof in a tapered head 4; a

double row taper roller bearing A for supportingsaid spindle in said bore near one end thereof; asingle row taper roller bearing B for supportV ingv the inner end of said spindle in said bore; a spacing sleeve 5 mounted on saidv spindle between said bearings; an annular closure member 6 for the annular space between said spindle and housing at said end of said bore; cap screws I for securing said end closure to said housing; and shims 8 clamped between the opposing ends of said clo sure and housing. The double row bearing A preferably comprises a` double inner raceway member or cone 9 mounted on the spindle 3 between a shoulder 3a thereon and the adjacent end of the spacing sleeve 5, two series of conical antifriction elements or rollers lo, and a separate cup or outer raceway member II for each series of rollers mounted in the bore 2 of the housing I. As shown in Fig. 1, the end closure 6 has an inwardly extending annular ange 6a on the inner end thereof that abuts against the outermost cup` ofthe bearing A and serves to seat the innermost cupagainst an annular shoulder 2a provided therefor in the bore 2, thereby preventing axial movement of said bearing relative to the housing I and spindle 3. The single row bearing B for supporting the inner end of the spindle 3 comprises an inner raceway member or cone I2 pressfltted on said spindle in endwise abutting relation to the inner end of the spacing sleeve 5, an outer raceway member or cup I3, and a series of conical antifriction elements or rollers I4 interposed between said cup and cone.

According to the present invention, the single row bearing B is supported in a carrier in the form of a one-piece metallic sleeve C having an inner end portion I5 presstted or otherwise fixed in the bore 2 of the housing I in abutting relation to an annular stop shoulder 2b provided therefor in said bore, an outer end portion I6 that is clear of said bore and an intermediate inwardly extending open accordion fold or return bend portion II forming a radially stiff but axially resilient connection between said end portion of said tubular carrier. As shown in the drawings, the cup I3 of the 4single tail bearing B is presstted or otherwise fixed in the free out'er end portion I6 of the carrier C; and the resilient fold Il of said carrier is compressed axially to preload both bearings by the end pressure transmitted to said lfold by the annular end closure ange 6a through the bearing A, sleeve 5 and bearing B.

By the' arrangement described, the desired preload of the bearing A is obtained by varying Athe number of shims 8 between the end closure 6 and the housing I', while the desired preload of the bearing B is obtained by proper choice of the length of the spacing sleeve 5. 'I'he flexibility of the accordion fold I1 of the carrier C compensates for flexure,` misalinement or axial displacement of the spindle or shaft 3, while the bearing preload is maintained and wear of the bearings taken up by the tendency for said fold to return to the normal, unstressed condition. 'I'he folded portion I'I of the carrier C has suiiicient radial stiffness to resist lateral displacement of the tail bearing B in the'bore 2 of the housing I. The foregoing construction also provides free axial resiliency without the necessity for a floating fit of the cup I3' in the carrier C or thercarrier 2 in the bore of thehousing I; and the rear. bearing B carries a share ofthe thrust load egual to the preload, whereby the load capacity is increased. The carrier C is preferably 4made from heat-treated carbon or alloy steel and is finished machined after heat treatment, the strength and resiliency of the carrier being determined by test.

Fig. 3 shows a roller bearing machineI tool spindle mounting, wherein the single row bearing B is substituted for i 1 ordinarily required for supportns tail endo! the machinegtool .spindle I8.k tion, thesingle tail bearing Brismountgizina j cup carrier CI similar to that shown The-carrier of Fig. 3, however, has an external `rib I9 that abuts againsta shoulder in thebore ofthe supportZI); and the bearing is preloaded by an end thrust -transmittedto the accordion fold I'I of said carrier by means of a nut IIlafm threaded on said spindlein endwise abutting relation to the cone I2 thereon. I A

In the bearing mounting shown in'Fig. 4, th preload on the bearing B is adjusted by means of nutsl 2I threaded on the shaft 22 in abutting Y j relation to the outer endof the cone I2of. said bearing. In this construction, the outer cup1` sup- .porting portion I6 of the carrier 4C2 has a series s of circumferentially spaced longitudinalgrooves 23 in theA outer periphery thereof through which` pins maybel inserted for pressing the inner end portion of the carrier into its seat in the bore of.

the housing 24. The accordion fold carrier has a series of circumferentially spaced holes 25 extending through the two folds thereof opposite the cup I3, whereby said cup may be removed from said carrier by pins inserted through these openings. l f j In the construction shown in Fig., 5,.the preload is adjusted bymeans of a pisteY ze that is lpressed against the outer-endfof the cone o'r in-- ner raceway `member-l2 of the supporting bearingi'for said shaft 2'I by means of cap screws 23.-

that extend through openings in said plate with their heads in abutting relation to the outer face of said plate and with their, shank portions' threaded into the adjacent end of said shaft. linvv this construction, the inner end of the cup carrier C3 is provided adjacent-to the .innermost lwall of the accordion fold Vwith an externalpe way member Il!l of the bearing B, and the cup carrier C4 has its outer end portion located outwardly of said `bearing to forman end closure 3 I for the lhousingV 32and toprovile a seat for an oilsea'l 33that'surrounds'thefshaft34. In

carrier and housing.

In the construction shown in Fig. y'7, the cup carrier C5 forms an end closure 31 for the housing 38, and the preload is adjusted by means of shims 39 interposed between the end of the housingand the closure portion of said carrier. In

this construction, the radial depth of the accordion fold I'Ia of the carrier is increased, thus providing maximum axial flexibility and free self-alining; and the cup supporting portion I3b l5 of the carrier has'one or more notches 23a in the outer periphery thereof whereby` the cup I3 of the bearing B may be forced out of the carrier by means of pins inserted insaid notches.

Fig. 8 shows an yapplication of the flexible cup 20,carrier C6 to the upperbearing of avertical grinding spindle 40. In` this construction, the

inner or lower end .I 5b of the cup carrier heid in the bore provided therefor in the bearing housing 4I by means of the. end` closure 42 'for said using, and preload of the` bearing is controlled by means of a nutA 43 threaded'on the upper end x f' 'of the spindle 40 in endwise abutting relation to the cone or inner raceway member I 2 of the bear- -4 ing. This' preloaded bearing fconstruction is 80 more simple and compact and requires fewer parts lthane-the preloaded bearing' constructions heretofore used with vertical grinder spindles.

Obviously, the hereinbefore described invention Mis' applicable to other bearing applications and is not limited to ta/per roller bearings, the invention being adapted forwpreloading angular ball ."bearings and for automatically-taking up the end play due to Wear and'expansion and'contraction of parts. The bearing carrier may also be used 4,0, for 'Supporting the inner raceway member of the bearing instead of the outerv raceway member thereof,fand the bearing may be preloaded by applying axial pressure to either the inner or outer racewaymember of the bearing.

What I claim is:

1. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antifriction bearing linterposed 'between said members, and a carrier for said bearing having a portion rigid with one of said members, a portion supporting said bearing, and a portion connecting said first and second portions, saidv connecting portion being yieldable with said bearing longitudinally of the axis ofv rotation of the bearing and relatively stiff in directions transverse to said axis.v v

' 2. A .bearing mounting comprising relatively rotatable inner and outer members, a rotary antii yfriction bearing interposed between said mem- 30 bers, and Ia carrierfor said bearing having end portions spaced apart axially of said bearing, one yrigid withfone of said members and 'the other supporting said bearing, and an axially resilient .radially stiff intermediate portion connecting said axially spaced end' portions 3. A bearing mounting comprising relatively -rotatable inner and outer members, a rotary antifrlction bearing interposed between said members, a one-piece carrier for said bearingvhaving r dilection'of the bearing axis, and means for compressing and ramen: no1-aon in are direction of i auch axis to preload said bearing. f

4. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antifriction bearing interped between said members, a one-'pie carrier for said bearing disposed between said members, said carrier having a lportion rigid with one oitV said members, and a portion clear of said member and constituting a seat for said bearing, and a portion connecting said iirst and second mentioned portions, said last mentioned portion being resilient in the direction of the bearing axis and relatively stii in directions transverse thereto, and manually adjustable means for compressing said resilient portion in the direction of such axis to thereby preload said bearing.

`5. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antifriction bearing interposed between said members, and a supporting sleeve disposed between and axially of said members, said sleeve having axially spaced end portions, one rigid with one of said members and the other free of said member, and an intermediate portion that is yieldable longitudinally of the axis of rotation of said bearing and relatively stiff radially of said axis, said bearing comprising inner and outer raceway elements and antifriction elements disposed therebetween,one of said raceway elements being sustained by the free end of said sleeve.

6. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antifriction bearing interposed between said -memf bers, and a supporting sleeve disposed between said members longitudinally of the axis of rotation of said bearing, said sleeve having axially spaced end portions, one rigid with one of said members and the other end free of said member, and an intermediate portion that is resilient in the direction of said axis and relatively stiii radially thereof, said -bearing comprising inner and outer raceway members and antiiriction elements disposed therebetween, said outer raceway member being rigid with the free end of said sleeve.

7. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antifriction bearing interposed between said members, and a supporting sleeve disposed between said members longitudinally of the axis of rotation of said bearing, said sleeve having an end rigid with one'of said members, an end free of said member, and an intermediate portion that is resilient in the direction of said axis and relativelystii radially thereof, said bearing comprising inner and outer -raceway members and antiiriction elements disposed therebetween, said outer raceway member being rigid with the free end of said sleeve, and means for compressing said resilient intermediate portion in the` direction of -said bearing axis to preload said bearing axially.

8. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antifriction bearing interposed between said members, said bearing comprising inner and outer raceway members and antiiriction elements disposed therebetween, and a carrier for said bearing having a-portion rigid with one of said members and a portion supporting said outer raceway member of said bearing and resiliently connected to said first mentioned portion for movement relative thereto longitudinally of the axis of rotation of said bearing, and means for compressing the resilient .connection between said portion of said carrier lengthwise of said axis to axially preload said bearing.

10. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antifricton bearing interposed between said members, said bearing comprising inner and outer raceway members and antifriction ele-- ments disposed therebetween, and a carrier for said bearing having a portionrigid with one oi said members and a portion vsupporting said 1l. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antiiriction bearing interposed between said` members, said bearing comprising inner and outer raceway members and antifriction elements disposed therebetween, and a carrierfor said bearing having a portion rigid with one of said members and a portion supporting said outer raceway member of said bearing and resiliently connected to said iirst mentioned portion for movement relative thereto longitudinally of the axis of rotation of said bearing, and means for compressing the resilient connection between said portion of said carrier lengthwise of said axis to axially preload said bearing, said compressive force being transmitted to said resilient connection through the outer raceway member of said bearing.

12. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antifriction bearing interposed between said members, and a carrier for said bearing having a. portion rigid with one of said members and a portion supporting said bearing and resiliently connected to said first mentioned portion for movement relative thereto lengthwise of the bearing axis, said first mentioned portion of said carrier being shaped and arranged to forman end closure for said outer member.

13. A bearing mounting comprising relatively rotatable inner and outer members, a rotary antifriction bearing interposed between said members, and a carrier for said bearing having a portion rigid with one of said members, and a portion supporting said bearing', and resiliently connected to said iirst mentionedl portion for movement relative' thereto lengthwise of the bearing axis, and an oil seal supported in said rst mentioned portion of said carrier and cooperating with said inner member, said first mentioned portion of said carrier and said oil seal forming an end closure for the annular space between said relatively rotatable inner and outer members.

14. A- bearing mounting comprising relatively rotatable inner and outer members, a rotary anti-friction bearing interposed between said members, and a carrier for said bearing comprising a sleeve interposed between and axially of said members and having axially spaced end portions, one rigid with one of said members and the other clear thereof and supporting said bearing, and-an axially resilient radially stiff intermediate portion connecting said end portions, said intermediate portion comprising an open fold or return-benddisposed radially of said sleeve.

-15. A bearing mounting comprising relatively rotatable inner and outer members, a rotary anti-friction bearing interposed between said members, and a carrier for said bearing comprislng a sleeve interposed between said members and having an end portion rigid with one of said members and an end portion clear thereofand supporting said bearing, and an axially resilient intermediate portion connecting said end portions, said axially resilient portion comprisingA an open fold or return-bendy disposed radially of said sleeve, and means for compressing said fold l axially of said sleeveto preload said bearing. v

tions, said axially resilient portion comprising an l open. fold or return-bend disposed radially of said sleeve, and means for compressingsaid fold axially of said sleeve to preload said bearing, the

c compressive force being transmitted tosaid fold or return-bend portion of said sleeve through said bearing. f

17. A bearing mounting comprising relatively rotatable inner and outer members, a rotary anti-friction bearing interposed between said members, said bearing comprising inner and outer raceway members and antifriction elements disposed therebetween, and a carrier for 4 A 'asuma said bearing comprising a sleeve vinterposed between said members and having an end portion rigid with one of said members and an end portion clear' thereof constituting a seat for one of said raceway members, and an axially resilient intermediate portion connecting said end portions, said axially resilient portion comprising an open fold or return-bend disposed radially of said sleeve, and means for compressing said fold axially of said sleeve to preload said bearing, the compressive force being transmitted to said fold or Vlretum-bend through one of the raceway members of said bearing.

18. A bearingmounting comprising relatively rotatable shaft and housing members, a rotary anti-friction bearing interposed between said members, and a carrier for `said bearing comprising a sleeve located in said housing member around said shaft member and having an end portion rigid with one of said members and the otherend portion clear thereof and forming a seat for said bearing, and an axially resilient intermediate portion connecting said end portions, said axially resilient portion 'comprisingan open fold yor return bend extending radially inwardly of said sleeve, the bearing supporting end portion of said sleeve having a longitudinal groovein the periphery thereof and said fold or open returnbend, having registering openings extending therethrough longitudinally of said sleeve in line with the bearing seat forming portion thereof, and means for compressing said fold or returnbend axially of said sleeve to thereby preload said bearing.

19. A bearing mounting comprising a, housing,

PAUL KLAIMP. 

